<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>CSS定位</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" type="text/css" media="screen" href="css01.css" />
    <script src="main.js"></script>
</head>
<body>
    <div id='container'>
        <div id='main'>
            <div id='box1'>1</div>
            <div id='box2'>2</div>
            <div id='box3'>3</div>
        </div>
        <div id='other'>
            
        </div>
    </div>
</body>
</html>